RE: Reset loop and XPOFWARN

Charlie — Tue, 27 Aug 2024 12:05:41 GMT

Hi Vincent,

[quote user=""]I was wondering if this case can lead to a reset loop ? My device tries to connect to the network every 15min. But if the battery is low, or if the antenna is removed, the modem will automatically be switched off.[/quote]

No, reset loop only counts the modem activations that lead to a reset without deinitializing the modem between the activations, and it does not count power supply caused brown out.

[quote user=""]The reset loop trigger after 7 resets. Is there any time restriction on this ? Is it 7 reset in 1h/day ? Of is it simply 7 reset in a row, without any proper switch off ?[/quote]

No time restriction, but keep in mind the counter will reset to zero in any of the following condiction:

1. when modem deinitialization with +CFUN=0 is triggered before the predefined limit is reached.

2. after modem initialization when a reset has not occurred in 60 s.

3. If the modem is activated after initialization and registration to network succeeds before 60 s has passed.

[quote user=""]Also, is there a way to read if the device is in the reset loop ? Or does it only work with %MDMEV ?[/quote]

Yes, you will get %MDMEV: RESET LOOP nottificiton if you set AT%MDMEV=1.

The above information is available in the white paper:

Modem Reset Loop Restriction (nordicsemi.com)

Best regards,

Charlie